RJ Hood Roofing (Winchester)

Fibreglass (GRP) flat ROOFING

Topseal is the ultimate BBA Certified fibreglass flat roofing system. Topseal GRP roofing systems are supplied with a 20-40 year product and workmanship guarantee and are environmentally sustainable & safe.

25+ years Experience

With over 25 years of trade and construction experience you can be assured of a professional standard of workmanship.

Free Quotations

We have always - and will always - offer free quotations on every job, no matter how big or how small. What's not to like?

All Work Guaranteed

We are so confident with the level of expertise and workmanship that we provide that all of the work that we undertake is 100% guaranteed.

Fibreglass (GRP) Flat Roofing

As an approved Topseal installer we believe that, with full BBA certification and a 30 year materials and workmanship guarantee (with Topseal HD) and a wide range of colours and finishes, Topseal is the ultimate stylish roofing system that money can buy.

The Topseal GRP (commonly known as Glass Reinforced Plastic or Glassfibre) roofing system has a proven pedigree as a waterproofing material, with an expected lifespan of 100 years and more.

Topseal's unique versatility means it can be used for a wide range of applications, from domestic roofs such as garages, extensions, dormers, porches, balconies and stairs, through to simulated lead replacement for listed buildings, large scale commercial works and custom 'one-off' specifications.

What's more, Topseal is environmentally friendly and doesn’t require any heat to install, making it the perfect stylish, high-performance, safe and eco-friendly flat roofing solution.

Topseal offers a range of fantastic looking roofing solutions for common domestic applications such as extensions, garages, dormer roofs, parapet walls, gulleys, gutters, conservatories, orangeries and many more. The versatility of Topseal will ensure that it will fit in with almost and style from ultra-modern to traditional Listed Buildings, providing long-lasting performance and style, even in the most extreme weather conditions and it comes in a choice of colours too.

Felt, fibreglass (GRP) or rubber (EPDM) flat roofing solutions - We've got you covered!

Comprehensive Guarantees

Each and every Topseal installation is backed by a manufacturers materials guarantee and covered by our guarantee on workmanship for the same period. Each installation can also be covered by Topseal's optional insurance-protected warranty.

All standard installations are covered for a period of 25 years. For installations where the HD system is used for roofing applications (not including heavy foot traffic applications), Topseal offers a class leading 30 year guarantee.

Topseal is guaranteed for a generation and designed to last a century.

Flat Roofs

What is a 'Flat Roof'?

It may sound like a stupid question, but a flat roof is typically not a flat roof.

A flat roof is a roof which is, contrary to it's name, almost never level, but which will appear level in contrast to the many types of sloped roofs.

The slope of a roof is properly known as its pitch, and flat roofs will typically have up to approximately 10° of pitch.

Construction Methods

There are a range of different construction methods for flat roofs in use throughout the UK today.

These include, but are not limited to: 3-ply 'torch-on' felt, fibreglass (GRP, or glass reinforced plastic) and rubber e.g. Firestone™ EPDM (Ethylene propylene diene monomer - now you can see why we generally refer to this as simply 'rubber' or EPDM!).

Which Type to Choose?

When it comes down to which type of flat roof solution to choose, there's no 'one size fits all' answer.

There are pros and cons to each method of construction and the price associated with it, and that's where the the benefit of an honest appraisal - one that suits your needs, in respect of both longevity and price - comes in.

When you request a quotation from RJ Hood Roofing, we'll discuss your requirements and will be happy to both advise and to provide a quotation for various flat roof construction types, should you require.

Our Services

We provide a wide range of both roofing and re-roofing services to the domestic and commercial markets, in Winchester and the surrounding areas (including: Kings worthy, Martyr Worthy, Itchen Abbas, Cheriton, Chilcomb, Sparsholt, Andover and more)

Slates & Tiles

Slate tiles have been used worldwide for thousands of years and are recognised as one of the finest roofing materials available.

Rubber Roofing

Although more expensive, ruffer roofing (EPDM) usually lasts up to twice as long as other flat roofing materials.

Fibreglass Roofing

A properly laid fibreglass (GRP) roof will last for at least 30 years with no measurable deterioration.

3-Ply Felt Roofing

The traditional, lower-cost flat roofing solution with a lifespan of up to 20 years.


End of life roofing? Re-roofing is the replacement of defective or worn materials as required.

Fascias & Soffits

Replacement of defective timbers for new uPVc fascias, soffits and guttering. A better alternative to annually painting over worn materials.​

Lead Work

The correct transport of rainwater is essential to the maintenance of any property, and helps to protect against unnecessary leaks.

Simulated Lead

Simulated lead is a cheaper, modern alternative to traditional lead - with the benefit that it's highly unlikely to be subject to theft.

Request your FREE QUOTATION right now!